AppPage.net

Screenshots

  • PLC-Inspector screenshot 1
  • PLC-Inspector screenshot 2
  • PLC-Inspector screenshot 3
  • PLC-Inspector screenshot 4

About PLC-Inspector

PLC-Inspector is a professional diagnostic tool for Siemens LOGO! controllers. Read memory, follow changes live and set registers, over Modbus/TCP, directly from iPhone, iPad or Mac. KEY FEATURES • Memory reading VM memory, analog inputs (AI) and analog outputs (AQ) of your LOGO! in real time. • Register writing Enter values in decimal or hexadecimal and send them to the controller. The app checks what the controller reports back and says so separately when the confirmation does not match the request. • Safeguarded writing Write mode has to be switched on deliberately and expires when you leave the view. Before every write there is a confirmation showing register and value in plain text, which can be switched off for a working session. • Bit-level visualisation Every register as a 16-bit value with colour-coded bit display. • Change detection Changed values are highlighted in orange. Jump between changes with the arrow buttons. • Auto-refresh Automatic updates in intervals from 0.5 to 10 seconds. • Multiple stations Manage any number of PLC stations with individual settings. APPLICATIONS - Commissioning and fault finding on site - Mobile process monitoring - Analysis of memory contents - Training and education TECHNICAL DETAILS - Protocol: Modbus/TCP (default port 502) - Reading: Read Holding Registers (FC 03), automatic splitting above 125 registers - Writing: Write Single Register (FC 06) with echo verification - Supported controller: Siemens LOGO! 8 (0BA8) NOTE The app needs a network connection to the LOGO! controller. The Modbus server must be enabled in LOGO!Soft Comfort. Developed by spiritdev Softwareentwicklung GmbH - your partner for industrial software solutions.

What’s new

Version 1.2 · Updated September 3, 2026

PLC-Inspector is now free. Reading memory, inspecting bits and watching registers stays free. New: iCloud sync, free for everyone. Stations you set up once are available on every device signed in to your iCloud account. Writing registers is part of PLC-Inspector Pro, a one-time purchase, no subscription. Bought PLC-Inspector while it was a paid app? Pro is included for you permanently, along with every future Pro feature. You don't need to do anything.

App privacy

The developer, spiritdev Softwareentwicklung GmbH, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to PLC-Inspector

Looking for apps like PLC-Inspector? Here are 6 similar apps on the App Store.

PLC-Inspector vs. alternatives
App Rating Price Last updated Compare
PLC-Inspector – Free September 3, 2026
S7 PLC HMI – Free Sep 18, 2026 Compare
AJ EV START – Free Aug 15, 2025 Compare
Modbus TCP Tools – Free Jul 22, 2026 Compare
Modbus Connect – Free May 7, 2026 Compare
NHXCHARGER – Free Dec 27, 2023 Compare
Modbus Explorer – Free Jul 19, 2026 Compare

Compare PLC-Inspector with the top alternatives: ratings, updates, ASO score and keyword gaps →